Natural Sunlight for Stability Testing of Perovskite Solar Cells

A major challenge facing the development of perovskite- based solar cells is combining high efficiency with long-term stability. Outdoor stability testing under natural sunlight provides the most relevant test of performance dynamics under operational conditions. Understanding these cells’ recovery properties under natural diurnal light-dark cycling can point to methods to extend its lifetime. Sunlight intensity/ concentration -dependent studies of perovskite-based devices elucidated the effect of bias applied to the solar cells on its lifetime and degradation mechanisms. Accelerated stability studies under different sunlight concentrations were examined to determine their relevance to degradation at operational conditions.